From d36deae75011a7890f0e730dd0f867c64081cb50 Mon Sep 17 00:00:00 2001 From: Jan Glauber Date: Tue, 7 Sep 2010 21:14:39 +0000 Subject: qdio: extend API to allow polling Extend the qdio API to allow polling in the upper-layer driver. This is needed by qeth to use NAPI. To use the new interface the upper-layer driver must specify the queue_start_poll(). This callback is used to signal the upper-layer driver that is has initiative and must process the inbound queue by calling qdio_get_next_buffers(). If the upper-layer driver wants to stop polling it calls qdio_start_irq(). Since adapter interrupts are not completely stoppable qdio implements a software bit QDIO_QUEUE_IRQS_DISABLED to safely disable interrupts for an input queue. The old interface is preserved and will be used as is by zfcp. Signed-off-by: Jan Glauber Signed-off-by: Martin Schwidefsky Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- arch/s390/include/asm/qdio.h | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h index 2ba630276295..46e96bc1f5a1 100644 --- a/arch/s390/include/asm/qdio.h +++ b/arch/s390/include/asm/qdio.h @@ -360,6 +360,7 @@ struct qdio_initialize { unsigned int no_output_qs; qdio_handler_t *input_handler; qdio_handler_t *output_handler; + void (*queue_start_poll) (struct ccw_device *, int, unsigned long); unsigned long int_parm; void **input_sbal_addr_array; void **output_sbal_addr_array; @@ -377,11 +378,13 @@ struct qdio_initialize { extern int qdio_allocate(struct qdio_initialize *); extern int qdio_establish(struct qdio_initialize *); extern int qdio_activate(struct ccw_device *); - -extern int do_QDIO(struct ccw_device *cdev, unsigned int callflags, - int q_nr, unsigned int bufnr, unsigned int count); -extern int qdio_shutdown(struct ccw_device*, int); +extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int, + unsigned int); +extern int qdio_start_irq(struct ccw_device *, int); +extern int qdio_stop_irq(struct ccw_device *, int); +extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *); +extern int qdio_shutdown(struct ccw_device *, int); extern int qdio_free(struct ccw_device *); -extern int qdio_get_ssqd_desc(struct ccw_device *dev, struct qdio_ssqd_desc*); +extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *); #endif /* __QDIO_H__ */ -- cgit v1.2.3